These three photos show how the bare patch got progressively smaller from August 2014 until May of 2016. The top photo shows that the grass has greened up for 2016. During 2015, the grass got rain water and very rarely got watered.

May 11, 2016

Jun 5, 2015

Aug 23, 2014

All these photos were taken from approximately the same place. The orange pin has been in the same spot since I started this.

There is for all intents and purposes, no top soil here. This area was scraped by the builder to create a drain swale. It was seeded over with Fescue in 2012, but the Fescue had completely died by October that year.

Zenith is difficult to get started, but I outline my methods in Tennessee Lawn Grass. But unlike Fescue, once it is established, there is no need to go back and re-seed every few years.